Tag Archives | Chromosomes

Dosage Compensation/Lyon’s Hypothesis | Genetics

In this article we will discuss about:- 1. Dosage Compensation and Sex-Chromatin Bodies 2. Details about Dosage Compensation or Lyon's Hypothesis 3. Objectives behind the Proposition of Lyon's Hypothesis and 4. Evidences in Support of Lyon's Hypo­thesis. Dosage Compensation and Sex-Chromatin Bodies: In man it has been found that Y-chromosomes are genetically inert in comparison to the X-chromosomes and other [...]

By |2016-12-12T07:34:23+00:00December 12, 2016|Chromosomes|Comments Off on Dosage Compensation/Lyon’s Hypothesis | Genetics

Classification of Human Chromosomes | Genetics

In this article we will discuss about the classification of human chromosomes on the basis of size and position of the centromere. All the human chromosomes in nor­mal numbers (46) can be arranged in groups based on size and positions of the centromere. The resulting classification of the chromo­somes is given in the following table: Methods of Human Chromosome Classifi­cation [...]

By |2016-12-12T07:34:23+00:00December 12, 2016|Chromosomes|Comments Off on Classification of Human Chromosomes | Genetics

Klinefelter’s Syndrome: History, Origin and Symptoms | Genetics

In this article we will discuss about:- 1. History of Klinefelter's Syndrome 2. Origin of Klinefelter's Syndrome 3. Symptoms 4. Ascertainment and Phenotype 5. Cytogenetic Findings 6. Frequency. History of Klinefelter's Syndrome: 1. In 1942, Klinefelter, Refenstein and Albright found nine men with small testes, aspermia, elevated urinary gonadotrophins and gynecomastics. These persons were later designated as Klinefelter's syndromic. 2. [...]

By |2016-12-12T07:34:23+00:00December 12, 2016|Chromosomes|Comments Off on Klinefelter’s Syndrome: History, Origin and Symptoms | Genetics
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